She probably set her more recent pics to private. When I first got on FB I didn't really know about the privacy settings so I think some of my albums were public. Now they are all private but I could see how some people might not have gone back and changed their old albums to private. I don't think this is a reason not to hire her. Just check out all her refernces really well.

No, I don't think it is a reason to not hire her. It is possible she simply uses facebook less now as a mother than she did when posting the going out pictures. It is also possible she increased her security settings. I wouldn't look too much into it, honestly.

I wouldn't not hire her just based on her pictures on FB. I know a lot of people who keep pics of their kids to a minimum on FB and many don't put pics of their LOs on there at all for privacy and safety reasons. That would be my first thought, or like other said, maybe those are set to private so only friends can see them.